import 'dart:math';

import 'package:flutter/material.dart';

class BuildingList extends StatefulWidget {
  BuildingList({super.key, required this.point});

  String point;
  @override
  State<BuildingList> createState() => _RoomListState();
}

class _RoomListState extends State<BuildingList> {
  Map data = {
    "point": "", // 记录小区信息
    "size": 0, // 随机产生楼栋的数量
    "type": "", // 小区的楼栋名称(size>4 单元, size<=4 号楼)
  };

  @override
  void initState() {
    super.initState();
    fakeData();
  }

  // 随机生成楼栋信息
  void fakeData() async {
    Random r = Random();
    // 随机产出3-8条数据
    int count = r.nextInt(6) + 2;
    // 如果数据<5，显示单元 ,否则显示楼栋
    data['point'] = widget.point;
    data['size'] = count;
    data['type'] = count < 5 ? '单元' : '楼栋';
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(
          title: const Text('选择楼栋'),
        ),
        body: ListView.builder(
          itemBuilder: (BuildContext context, int index) {
            return GestureDetector(
              onTap: () {
                Navigator.pushNamed(context, '/roomList', 
                arguments: {
                  'point': data['point'],
                  'building': '${index + 1}${data['type']}'
                });
              },
              child: Container(
                  color: Colors.white,
                  padding: const EdgeInsets.all(10),
                  child: Row(children: [
                    Expanded(
                        child: Text(
                            '${data['point']}${index + 1}${data['type']}')),
                    const Row(children: [
                      Icon(Icons.arrow_forward_ios,
                          size: 16, color: Colors.black),
                    ])
                  ])),
            );
          },
          itemCount: data['size'],
        ));
  }
}
